Clamp.



v I No. 823,903.

1). sworn.

CLAMP. 'APPLIUATIOR FILED APB.24.1905.

Ammzw av GRAHAM co, Puom-umosmwzas. WASHINGTON a c.

PATENTED JUNE 19, 1906.

DAVID sworn, OF MEROHAN-TVIL ENEW JERSEY;

CLAMP.

Specification ofLetters- Patent.

Patented June19, 19 U6.

Application filed AprilZ f', 1905; Serial No; 257,279;

To all whom it may concern:

Be it known that 1, DAVID Sworn, a citizen of-the United States, residing in Merchantville, in the county of Camden, State of New Jersey, have invented a new and useful Clamp, of which the following is a specification. l

My invention relates to the novel-construe tion of clamp intended principally for gripping hides, skinsyor other material/during the act of Stretching the same.

It is adapted toreplace toggles" which perforate, thus avoidingperforation of the hides for the insertion of the toggle-strings connecting to the frames. I

The object of this invention is to produce a strong light compact structure of simple form which will retain the leather during treatment, so that the leather-finishing devices will not touch the jaws of the clamp. A further object is to produce a structure not easily injured in use and one having a skeleton frame whereby a minimum surface 'of said frame is exposed to the enamel applied to the leather.

'A further object is to produce a clamp which will tighten in use and which will retain any thickness of material.

' Further objects will be apparent from the description and claims.

In the drawings, Figure 1 is'a perspective view of one embodiment of my invention in open position. Fig. 2 is a longitudinal section of a clamp embodying my invention in operative position. Fig. 3 is a fragmentary side elevation of a structure embodying my invention. Fig. 4 is a longitudinal section of a portion of a clamp embodying my inven-' tion, showing the material as being gripped in a different manner.

' Similar numerals indicate corresponding parts in the several views.

' 1 designates a clamp composed of two members 2 and 3, which are shown and preferably used in pivoted relation. Member 2, as shown, is composed of a single sheet or plate, whose middle front piece or portion 4 is rearwardly bent or turned-at 5 to form a clamp or jaw 6. Upon each end of the mid.

dle front portion .4; is a rearwardly-extending arm 7. These two arms are curved in the form shown in the plane of the plate from which the arms 7 are formed,- and they converge at the rear and'a're united by transverse overlapping extensions 8 and 9. It

will be evident that this member 2 therefore consists of a front piece or portion 45, hav

ing a rearwardly extending clamping portion 6 and sidewalls 7, extending from the front portion 4 into juxtaposition at the rear. It will be apparent thatin mypreferred construction', as seen in Fig. 1, the member 2 is hollow and that no bottom member is necessary.

The transverse rear extensions 8 and 9 of the side arms 7" are most desirably shown in the illustration provided with substantially registering eyes 10 and fl, through which a conductor, rod, cord, or wire 19 may be passed. These eyes form guides for the red, wire, or conductor, while at the same time this conductor keeps the transverse extensions' in position with the eyes substantially in line. I

Within the hollowframe member 2 I place" member 3, preferably pivoted therein at 12' and 13, respectively, by extensions-1 4 and which pass throughthe apertures- 12 and 13. The internal member '3' comprises a front piece 16, the upper edge 20 of which contacts with the middle front portion 4" of the member 2, the material tobe' gripped being held between the upper face of the front piece 16 and the rearwardly-extending jaw 6, as shown in Fig. 2, althoughit will be ap-- parent that, if desired, as shown in Fig; 4,

the material-21 to be gripped may be so en= gage'd by the" clamp that it will be held between. the middle front portion 1 of the member 2 and" the upper edge 20* of the j aw 1'6 and between the rearward jaw 6 and the" upper edge 20 of the front piece'16ofthe internal -member 3. Upon the opposite side of the pivot-point from the jaw 16 I forman arm or extension 1 7, which I have illustrated aslying at an angletothe' jaw 16. I

It willbe evident that this extension 17 has full play within the member 2, except as it may be restricted by engagement of the front piece or jaw 16 with the middleportion 4' of the member 2 or with the material grasped between these parts; 7

At any suitable-point in the extension 17 I form an aperture 18, through which; the cord, wire, or" other flexible or stiflmaterial or connector 19, passing'ithrough apertures or eyes 1 0 and 11', is also adapted to pass; This cord or other connector, flexible or rigid, which I will hereinafter'call a connector, without, however, any intentio1r-o'f-restrict" ing it to flexible material, may terminate immediately beyond the aperture 18 in a head or enlargement or in other means by which it is prevented from being drawn through said aperture, or it may be connected in such manner that strain upon the connector upon that portion beyond the eyes 10 and 11, if the connector terminate at aperture 18, or upon either or both ends of the connector in case the end does not occur at 18, will draw the extension 17 toward the inner portion of the member 2, moving the front piece 16 into its gripping position. It will be evident that in case of such use increase of strain causes increase of gripping action. It will be further evident that the tendency of the clamping portion is to place itself, with the eyes, below the upper surface of the rearward jaw 6, as seen by Fig. 2, in which the line of direction of the leather is above the rear of the clamp, and, in fact, with the whole rear portion of the clamp substantially below this level. (Shown in dotted line at ac 9c in Fig. 2.) This line represents the plane of the material stretched. The aperture through the transverse extensions 8 and 9 is in a plane above the pivotal point of the internal clamping member. It will be apparent from Fig. 2 that the laterally-extending sides 7 of the hollow member 2 are bent upwardly at their rear, so that the aperture through the transverse extensions 8 and 9 are in a plane above the pivotal point of the internal clamping member 3.

Having now described the nature and obj ects of the invention, what I claim as new, and desire to secure by Letters Patent, is

1. A clamp consisting of two members, one member comprising a front piece having a rearwardly-extending jaw, and having side pieces connected with said front piece and rearwardly extending to come into proximity at their rear ends, and a second member comprising a front piece pivoted to said first member and provided with an arm extending rearwardly therefrom and angularly thereto, said arm and the rear ends of said side pieces being apertured, and movable toward each other to cause the clamping.

2. In a device of the character described, a hollow apertured member having a front piece and an upper rearwardly-extending jaw thereon, and an internal member pivoted within said hollow member and having a clamping-j aw, the upper edge of which, when in clamped position, engages said front piece beneath said upper rearwardly-extending jaw, whereby the material is clamped between the clamping-j aw of the internal member and the front piece and rearwardly-extending jaw of the hollow member, and means engaging said internal member and passing through said aperture for clamping said members.

3. In a device of the character described, a hollow member having a rearwardly-extending jaw and a rear aperture, and an internal member pivoted to said hollow member and having a clamping-jaw and an arm rearwardly deflected therefrom, the end of said arm terminating within said hollow member, and means engaging said aperture for moving the jaws toward each other to clamp them.

4. In a device of the character described, a hollow member comprising a front piece, rearwardly-extending side arms overlapping each other at their rear, and a rearwardlyextending jaw at the upper end of said front piece, an internal clamping member pivoted to the rearwardly-extending arms of said hollow member in proximity to the front piece thereof, said internal member comprising a clamping-jaw and an arm extending angularly therefrom, and means engaging said arm and passing through said hollow member to clamp the material between the clamping-j aw of the internal member and the front piece and rearwardly-extending jaw of said. hollow member.

5. In a device of the character described, a hollow member having a rearwardly-extending jaw and rearwardly-extending side arms converging at their rear and united by transverse overlapping extensions, said extensions having an aperture therethrough, and an internal pivoted member comprising a clamping-jaw, and an arm extending therefrom, said arm having an aperture therein, and a connector in connection with the aperture of said internal clamping member and passing through the aperture in the transverse overlapping extensions of said hollow member.

6. In a device of the character described, a hollow member having a rearwardly-extending jaw, rearwardly-extending side arms converging at their rear end and united by transverse overlapping extensions, said extensions having an aperture therethrough, and an internal pivoted member comprising a clamping-jaw, and an arm extending therefrom, and a connector secured to said internal member and passing through the aperture in the transverse overlapping extensions of said hollow member, the rearwardly-extending portions of said hollow member being bent upwardly at their rear so that the aperture through said transverse extensions is in a plane above the pivotal point of said internal clamping member.

DAVID SWOPE.

Witnesses:

A. E. LEE, W. F. JAoxsoN. 

